Develop and modify the eight-bit ALU specified in Problem 4.44 so that it has three-stat...

Develop and modify the eight-bit ALU specified in Problem 4.44 so that it has three-state output controlled by an enable input, E_n . Write a test bench and simulate the circuit.

Reference: Problem 4.44

Using a case statement, write an HDL behavioral description of a eight-bit arithmeticlogic unit (ALU). The circuit has a three-bit select bus (Sel), sixteen-bit input datapaths (A[15:0] and B[15:0]), an eight-bit output datapath (y[15:0]), and performs the arithmetic and logic operations listed below.